Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual foi o tempo registrado para o grid 18?
 ###Tabelas: CREATE TABLE house_of_valois-burgundy_1405–1482 (house_of_valois-burgundy_1405–1482_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Date of birth VARCHAR, Date of death VARCHAR, Reign VARCHAR, Relationship with predecessor VARCHAR) CREATE TABLE joystiq (joystiq_id AUTO_INCREMENT PRIMARY KEY, Year INT, Game VARCHAR, Genre VARCHAR, Platform(s) VARCHAR, Developer(s) VARCHAR) CREATE TABLE race (race_id AUTO_INCREMENT PRIMARY KEY, Driver VARCHAR, Constructor VARCHAR, Laps INT, Time/Retired VARCHAR, Grid INT) CREATE TABLE pga_tour_wins_20 (pga_tour_wins_20_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Winning score VARCHAR, Margin of victory VARCHAR, Runner(s)-up VARCHAR) CREATE TABLE faculty_and_staff (faculty_and_staff_id AUTO_INCREMENT PRIMARY KEY, Data VARCHAR, Headcount INT, Percent of total VARCHAR, Less than $25,000 VARCHAR, $25,000 to $40,000 VARCHAR, $40,000 to $50,000 VARCHAR, $50,000 to $60,000 VARCHAR, $60,000 to $70,000 VARCHAR, $70,000 to $80,000 VARCHAR, More than $80,000 VARCHAR, Mean VARCHAR)  
SELECT Time/Retired FROM race WHERE Grid = 18